?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Ahmed%2C+S&rft.aulast=Ahmed&rft.aufirst=S&rft.date=9+December+2021&rft.issn=1664-3224&rft.atitle=A+Stabilized%2C+Monomeric%2C+Receptor+Binding+Domain+Elicits+High-Titer+Neutralizing+Antibodies+Against+All+SARS-CoV-2+Variants+of+Concern&rft.title=Frontiers+in+immunology&rft.genre=article